Attrition feed-mill



E. J. PHILLIPS.

ATTRITION FEED MILL.

APPLICATION men MAY 5.1919.-

Patented Dec. 16,1919.

EDWARD JAMES PHILLIPS, 0F MILWAUKEE, WISCONSIN.

ATTRITION FEED-MILL.

Specification of Letters Patent.

Patented Dec. 16, 1919.

Application filed May 5, 1919. Serial No. 294,860.

T 0 all whom it may concern:

Be it known that I, EDWARD J. PHILLIPS, a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of lVisconsin, have invented certain new and useful Improvements in Attrition Feed-Mills, of which the following is a specification.

This invention relates to mills for grinding feed provided with attrition disks arranged to revolve in vertical planes; and it consists of novel grinding plates as hereinafter fully described and claimed which are secured to the said disks.

In the drawings, Figure l is a vertical section through the principal parts of one form of an attrition mill provided with grinding plates according to this invention. Fig. 2 is a detail front view of one of the grinding plates. Fig. 8 is a cross-section of the grinding plate, taken on the line in Fig. 2.

The mill is provided with a casing 3, and 'i: are disks mounted on shafts 5 which are journaled in suitable bearings 6 and revolved in opposite directions in any approved way. The disks are arranged to face each other, and if desired one disk may be stationary, but it is preferable to revolve both disks. One disk may have a hollow shaft so that the material may be fed to the center of the space between the disks, or one of the disks may have a feed opening. All of these parts are of any approved construction. The grinding plates 7 are segmental in shape, and they are secured to the faces of the disks by bolts or screws 8. Each disk preferably has six similar segments or plates secured to it, and having their ends fitted together so as to make a complete ring. The tops or outer parts of the plates have a peripheral rib 10 formed on a circular are which is arranged concentric with the disk to which the plates are bolted. The inner edges 9 of the plates are also formed on circular arcs, and are concentric with the peripheral rib 10.

Radial ribs 12 project from the surface of each plate, and are arranged across its face at suitable intervals. Shorter radial ribs 14 are arranged between the long ribs 12 at the outer part of the plate where the long ribs 12 are farther apart. An eccentric rib 15 is arranged to project from the face of each plate between the outer or peripheral rib l0 and the inner edge 9. The rib 15 extends diagonally across the face of the plate, and one end of it is about the same distance from the outer edge of the plate as its other end is from its inner edge. All the plates are alike in this respect,and the ends of the ribs 15 of adjacent plates are considerably out of line with each other. This eccentric rib effects an important improvement in the grinding action, as the similar eccentric ribs 15 of opposed plates are arranged to pass each other, so that the eccentric rib of one plate forces the grain against the eccen tric rib of the other plate. All the radial ribs 12 and 14: have longitudinal grooves 16 formed in them, and the ribs and their grooves are tapered slightly and are arranged with their narrow ends adjacent to the eccentric rib. The grooves 16 are arranged at the middle parts of the radial ribs, so that the radial ribs have flat surfaces on each side of the grooves 16 Which form sharp cutting edges 17 with the said grooves. The grooving of the ribs has the effect of increasing the number of the cutting edges on each plate, and thereby enables the plate to grind the material more effectively.

The plates can be made in the form of annular rings divided into similar sections instead of segments which are separable. The grinding plates can also be provided upon both sides of a disk when multiple disks are used.

That I claim is:

1. An annular grinding member, comprising a series of segments or sections, each of which has an eccentric rib extending diagonally across its middle part, the ends of the eccentric ribs of adjacent segments or sections being arranged out of line With each other, and all the segments or sections having radial ribs suitably spaced apart.

2. An annular grinding member, comprising a series of segments or sections, each of which has radial ribs which project from its surface, said radial ribs having longitudinal grooves in their middle parts, and having fiat faces at each side of each groove, four cutting edges being thereby provided on each radial rib.

3. An annular grinding member, comprising a series of segments or sections, each of which has an eccentric rib extending dia 0- middle parts and flat faces on each side of nally across its middle part, the ends of t e the grooves, four cutting edges being thereeccentric ribs of adjacent segments or secby provided on each radial rib. 10 tions being arranged out of line with each In testimony whereof I have afiixed my other, and all the segments or sections havsignature.

ing radial ribs suitably spaced apart and V n provided with longitudinal grooves at their 7 EDWARD J. PHILLIPS. 

